Foraging population sizes in Africanized (A) and European (E) honey-bee (Apis mellifera L.) colonies were determined by trapping returning foragers at the hive. E colonies fielded

significantly larger foraging populations than A colonies. E colonies showed much larger variability in sizes of foraging populations than A colonies, responding with more foragers as colony size was increased and especially when nectar was more abundant.

The percentage of colony members foraging was similar for both sizes (1 and 3 kg of adult bees) of E colonies ; 1 kg A colonies had a greater percentage of foragers than 3 kg A colonies.E colonies responded with a greater percentage of foragers than A colonies when nectar was more abundant.